Origin
Australia, Southern and central Africa, green, brown, Australia, France, green, brown, Australia, France
  
Brazil, Madagascar, Zambia, Sri Lanka, Burma, Russia, USA, Afghanistan
  
Color
Green, Colorless, gray, Yellow, White
  
Green, Blue, Yellow, Red, Brown, White, Colorless, Blue, Red, Green, Yellow, pink
  
Streak
Colorless
  
White
  
For which Rashi?
Libra
  
Libra
  
Planet
Venus
  
Venus, Mars
  
Element of Planets
Earth
  
Water
  
How to Wear?
  
  
Finger
Not Available
  
Not Available
  
Ring Metal
Not Available
  
Not Available
  
Energy
Receptive
  
Projective
  
Deities
Freya
  
Venus
  
Not to wear with
Not Available
  
Not Available
  
Powers
Not Available
  
Love, Courage
  
Birthstone
  
  
Planetary
Not Available
  
Not Available
  
Talisman
Not Available
  
Not Available
  
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.80-2.95
  
2.85-3.35
  
Fracture
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
  
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Distinct on [001]
  
Indistinct
  
Mohs Hardness
6-6.5
  
7-7.5
  
Chemical Composition
Ca2Al2Si3O12(OH)
  
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
  
Luster
Vitreous
  
Vitreous
  
Pleochroism
AbsentWalter Schumann
  
typically moderate to strong
  
Dispersion
None
  
Transparency
Translucent
  
Transparent, Translucent, Transparent to opaque
  
Refractive Index
1.611-1.673
  
1.614-1.666
  
Optic Character
Not Available
  
Not Available
  
Crystal System
Orthorhombic
  
Trigonal
  
Birefringence
0.021-0.033
  
0.014-0.040
  
Clarity
TranslucentHerve Nicolas Lazzarelli
  
Transparent
  
Physical
  
  
Neurological
Not Available
  
Not Available
  
Cardiovascular
Not Available
  
Not Available
  
Respiratory
Not Available
  
Not Available
  
Reproductive
Not Available
  
Not Available
  
Digestive
Not Available
  
Not Available
  
Psychology
Not Available
  
Not Available
  
Healing
Not Available
  
Not Available
  
Qualities Associated
Not Available
  
Not Available
  
Prehnite Vs Tourmaline Specifications
While buying, there is a common bewilderment that most of the buyers face. As you compare Prehnite Vs Tourmaline specifications, it helps you to decide which gemstone suits your zodiac sign. Besides, the extent to which a gemstone benefits you can be understood after comparing Prehnite and Tourmaline Astrology. Its highly necessary to have a basic knowledge of facts about Prehnite and Tourmaline, before you finalize to buy one.
Prehnite is known to regulate the influence of Venus planet.Prehnite, that occurs commonly in Green, Colorless, gray, Yellow, White color, possesses Receptive energy.Tourmaline, the unique gem is known to regulate the influence of Mars and Venus planet. Tourmaline, which is classic Green, Blue, Yellow, Red, Brown, White, Colorless, Blue, Red, Green, Yellow, pink colored gem, possesses Projective energy.